US3598149A - High-pressure metering valve - Google Patents

High-pressure metering valve Download PDF

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Publication number
US3598149A
US3598149A US3598149DA US3598149A US 3598149 A US3598149 A US 3598149A US 3598149D A US3598149D A US 3598149DA US 3598149 A US3598149 A US 3598149A
Authority
US
United States
Prior art keywords
control rod
outlet ports
tubular member
passage
metering valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
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English (en)
Inventor
Donald E Witkin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Forge Co
Original Assignee
National Forge Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by National Forge Co filed Critical National Forge Co
Application granted granted Critical
Publication of US3598149A publication Critical patent/US3598149A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/52—Means for additional adjustment of the rate of flow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87499—Fluid actuated or retarded
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87539—Having guide or restrictor

Definitions

  • ABSTRACT A high-pressure, restriction-flow-metering valve 138/46 in which a control rod is longitudinally inserted in a hollow [51] lut.Cl FlSd 1/00 cylinder of slightly larger internal diameter having exhaust [50] Field of Search 137/599, ports at either end and a high-pressureinput port intermediate 608, 625.3; 251/120, 121; 138/46, 45 the cylinder ends.
  • the present invention relates to high-pressure metering valves and more particularly to high-pressure, restriction flow valves in which a control rod is slidably fitted within a cylinder having a bore slightly larger than the diameter of the rod so as to form an annular restriction for fluids passing through the cylinder.
  • the present invention overcomes these problems by providing a cylinder having a high-pressure input at a point between the cylinder ends. Any forces exerted on the rod are balanced and the rod gasket is at the low-pressure end of the cylinder where the gasket-packing problems are negligible.
  • the control rod need not be designed for compressive loads and may be made extremely thin for use in very small high-pressure valves. The absence of axial pressure forces on the rod also simplifies the design of a practical actuator for the control rod in such small valves.
  • the invention comprises a metering valve including a hollow cylinder having output ports at both ends, an input port intermediate the cylinder ends and having an internal diameter which is substantially uniform between the output ports.
  • a control rod having a substantially uniform diameter which is slightly smaller than the internal diameter of the cylinder is partially inserted in the cylinder, longitudinally.
  • FIGS. IA and 13 when joined together as indicated, form a side elevational view, partially in section, of a preferred embodiment of the present invention.
  • the other end of the tube I2 is connected to an ell member 24.
  • a pipe 28 is connected at one end to the ell member 24 and at the other end to an exhaust port 30.
  • a bore 26, in the ell member 24, provides a fluid passage between the end of the tube 12 and the end of the pipe 28 connected to the ell member 24.
  • the other end of the tube I6 is connected to a tee member 32.
  • a straight bore 34 extends completely through the tee member 32 to provide a fluid passage between the end of the tube 16 and an opening 36, in the tee member 32, directly opposite the end of the tube 16.
  • the longitudinal axis of the bore 34 is aligned with the longitudinal axes of the tubes 12, I6 and the bore 20 in the tee member 18 such that all the axes form a straight line.
  • the continuous fluid passage provided by the bore 34, the tube I6, the bore 20, and the tube 12 has an internal diameter which is substantially uniform throughout its length.
  • a pipe 40 is connected at one end to the tee member 32 and at the other end to the exhaust port 30.
  • the ends of the tubes 12, I4, and 16 are coned and are provided with left-hand threaded collars 56.
  • the collars 56 are slidably received within bores 58 in gland nuts 60.
  • the gland nuts 60 are right-hand threaded into the respective tee and ell members.
  • the gland nuts 60 bear against the collars 56 to force the ends of tubes I2, 14, 16 into conical seats 62 in the respective tee and ell members, making nearly fluidtight seals.
  • the tee and ell members have bores 64 (shown in the drawing as directed into the page) leading from the outermost edge of the conical seats 62 to the exterior surfaces of the members to insure that fluid leaking past the conical ends of the tubes I2, 14, 16 does not exert an axial force on the collars 56 and gland nuts 60.
  • the pipes 28, 40 are connected to the respective members 24, 32 by threadably fitted adapters 70.
  • a control rod 42 having a substantially uniform diameter throughout its length which is slightly smaller than the internal diameters of the bores 20 and 34 and the hollow tubes I2 and I6 is mounted at one end in a anchor member 46 by means of a setscrew 44.
  • the anchor member 46 is mounted on the end of a piston rod 48 slidably fitted within an air cylinder 50. The axial position of the rod 42 may be controlled by varying the air pressure within the cylinder 50.
  • the control rod 42 is longitudinally fitted through a tube 52, rubber wiper 54, and the bore 34 in the tee member 32.
  • the rubber wiper 54 fits snugly around the control rod 42.
  • the tube 52 is of the same construction as the tubes 12, I4 and 16 but it is used only to support and position the control rod 42.
  • One end of the tube 52 is provided with a left-hand threaded collar 57 which is slidably received within a bore 59 in a gland nut 6I.
  • the tube 52 is approximately the same length as the gland nut 61.
  • the gland nut 61 is threadably received in the opening 36 in the tee member 32 and together with the rubber wiper 54, positioned in the opening 36, forms a seal to prevent the escape of fluid from the tee member 32.
  • the control rod 42 may be longitudinally inserted through the combined lengths of the tube 52, the bore 34, the tube 16, the bore 20, and the tube 12, or positioned at any intermediate length.
  • the elongated annular restriction thus provided between the inserted portion of the rod 42 and the walls of the bore 34, the hollow tube 16,
  • the bore 20 and the hollow tube I2 distributes the pressure drop across the length of the valve such that no extremely small orifices or short paths exist to promote erosion of the valve when high-velocity fluids pass through it.
  • the annular restrictions in the tube members I2, 16 are at their greatest, and the rate of fluid flow through the tube members l2, I6 is at a minumum.
  • control rod 42 If the control rod 42 is fully withdrawn, the rate of fluid flow is at a maximum. In the preferred embodiment, the position of the control rod 42 is varied between complete insertion and a position of withdrawal such that the end of the control rod 42 lies at the junction of the bores 20 and 22.
  • the other end of the tube member 14 is con nected to a vessel containing fluid under high pressure (not shown).
  • the pressure in the vessel falls, the pressure drop across the metering valve decreases, and the flow through the valve will decrease.
  • the rate of pressure decay in the pressure vessel will decrease.
  • the control rod 42 is slowly withdrawn so that the length of the annular fluid restriction in the tube member 12 is decreased. With the decrease in the length of the annular restriction, the flow in the tube member 12 is increased to sustain the imposed pressure drop across the valve assembly 10.
  • the rod 42 is withdrawn at the proper rate to maintain a constant rate of pressure decay in the vessel.
  • the tube assembly is mounted on a rigid member 66 by means of brackets 68 which are fitted around the tubes 12, and 16.
  • the air cylinder 50 is also mounted to the rigid member 66.
  • control rod 42 and the tubes l2, 16 are made of a material which has compressive and tensile strength but which is flexible.
  • the material used is stainless steel.
  • the longitudinal axes of the tubes l2, l6, bores 20, 34, and the control rod 42 do not necessarily form a straight line but may form a curved line to suit particular constructional arrangements of the valve. ln some embodiments, the axis of the control rod 42 and the axes of the tubes l2, l6, and the bores 20, 34 are not coaxial, though the rod lies within the respective tubes and bores.
  • the cylinder assembly 10 is cast as a single member and the fluid passages are machine bored.
  • a flow-metering valve comprising an elongated hollow tubular member having spaced outlet ports defining therebetween a continuous, elongated fluid passage, said member having an inlet port communicating with said fluid passage at a point intermediate said outlet ports, an elongated control rod, means to mount said control rod in said passage for longitudinal movement along said passage, said control rod having a diameter less than that of said passage and substantially uniform throughout the length of said control rod to permit fluid flow along said passage around said control rod, and externally controllable means for moving said control rod longitudinally of said passage thereby to vary the ratio of fluid flow resistance in said passage between said inlet port and said respective outlet ports.
  • a flow-metering valve as set forth in claim I in which said control rod is movable between a first position in which said control rod extends substantially throughout the length of said fluid passage between said outlet ports and a second position in which said control rod is out of that portion of said fluid passage extending between one of said outlet ports and said intermediate point.
  • a high-pressure flow-metering valve comprising an elongated hollow tubular member having spaced outlet ports adjacent opposite ends thereof and an inlet port communicating with the interior of said member at an intermediate point, said tubular member having an internal diameter which is substantially uniform throughout its length between said outlet ports,
  • control rod having a diameter less than that of said tubular member and substantially uniform throughout the length of said control rod, means to mount said control rod for movement longitudinally of said tubular member, one end of said control rod being located within said tubular member and the other end of said control rod being located externally of said tubular member, said control rod being movable between a first position in which said control rod extends through said tubular member substantially spanning the distance between said outlet ports and a second position in which said tubular member spans within said tubular member substantially only the distance between said intermediate point and one of said outlet ports, and externally controllable means for moving said control rod between said positions thereof thereby to vary the ratio of fluid flow resistance between said inlet port and said respective outlet ports.
  • a high-pressure flow-metering valve as recited in claim 4 comprising an elongated hollow tubular member having spaced outlet ports adjacent opposite ends thereof and an inlet port communicating with the interior of said member at a point substantially equidistant from the outlet ports.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
  • Pipe Accessories (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Joints Allowing Movement (AREA)
US3598149D 1969-08-04 1969-08-04 High-pressure metering valve Expired - Lifetime US3598149A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84716869A 1969-08-04 1969-08-04

Publications (1)

Publication Number Publication Date
US3598149A true US3598149A (en) 1971-08-10

Family

ID=25299956

Family Applications (1)

Application Number Title Priority Date Filing Date
US3598149D Expired - Lifetime US3598149A (en) 1969-08-04 1969-08-04 High-pressure metering valve

Country Status (8)

Country Link
US (1) US3598149A (fr)
JP (1) JPS522128B1 (fr)
BE (1) BE753002A (fr)
DE (2) DE7025097U (fr)
FR (1) FR2056354A5 (fr)
GB (1) GB1319486A (fr)
NL (1) NL145029B (fr)
SE (1) SE380336B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333648A (en) * 1992-10-13 1994-08-02 Sentry Equipment Corp. Variable pressure reducing device
US5363874A (en) * 1992-10-08 1994-11-15 Sentry Equipment Corp. Automated sample conditioning module
US5808904A (en) * 1996-11-07 1998-09-15 Angstrom Corporation Continuous duty tie rod press strain monitor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1510802A (en) * 1919-12-15 1924-10-07 Super Diesel Tractor Corp Metering valve
US2282675A (en) * 1940-11-05 1942-05-12 Gulf Research Development Co Controller for flowing gases
US2344943A (en) * 1942-08-10 1944-03-28 Claude R Wickard Adjustable resistor for flowmeters
US2531479A (en) * 1944-12-22 1950-11-28 John A Southern Flow regulation valve
GB694416A (en) * 1951-04-28 1953-07-22 Fisher Governor Company Ltd Improvements in valves for controlling the flow of fluids under pressure
US3135994A (en) * 1960-11-30 1964-06-09 Monsanto Chemicals Apparatus for adjusting back-pressure in extruders during continuous operations

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1510802A (en) * 1919-12-15 1924-10-07 Super Diesel Tractor Corp Metering valve
US2282675A (en) * 1940-11-05 1942-05-12 Gulf Research Development Co Controller for flowing gases
US2344943A (en) * 1942-08-10 1944-03-28 Claude R Wickard Adjustable resistor for flowmeters
US2531479A (en) * 1944-12-22 1950-11-28 John A Southern Flow regulation valve
GB694416A (en) * 1951-04-28 1953-07-22 Fisher Governor Company Ltd Improvements in valves for controlling the flow of fluids under pressure
US3135994A (en) * 1960-11-30 1964-06-09 Monsanto Chemicals Apparatus for adjusting back-pressure in extruders during continuous operations

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5363874A (en) * 1992-10-08 1994-11-15 Sentry Equipment Corp. Automated sample conditioning module
US5333648A (en) * 1992-10-13 1994-08-02 Sentry Equipment Corp. Variable pressure reducing device
USRE37153E1 (en) * 1992-10-13 2001-05-01 Sentry Equipment Corp. Variable pressure reducing device
US5808904A (en) * 1996-11-07 1998-09-15 Angstrom Corporation Continuous duty tie rod press strain monitor

Also Published As

Publication number Publication date
NL7008901A (fr) 1971-02-08
DE7025097U (de) 1971-12-09
NL145029B (nl) 1975-02-17
DE2033081B2 (de) 1973-11-08
GB1319486A (en) 1973-06-06
FR2056354A5 (fr) 1971-05-14
DE2033081A1 (de) 1971-02-18
DE2033081C3 (de) 1974-05-30
SE380336B (sv) 1975-11-03
JPS522128B1 (fr) 1977-01-20
BE753002A (fr) 1971-01-04

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